How to Read Food Labels for Hidden Gluten

Reading food labels is the single most important skill for anyone living gluten-free. Gluten hides in dozens of unexpected places including salad dressings, soy sauce, soups, and medications.


The Obvious Offenders


The clearest sign of gluten is wheat, barley, or rye on the ingredient list. Under FDA food allergen labeling rules, wheat must be declared on all food labels. Look for wheat (including spelt, kamut, einkorn, emmer, durum, semolina, farro), barley, rye, and triticale.


Hidden Gluten Sources


Malt and malt vinegar are almost always derived from barley. Malt flavoring, malt extract, and malt syrup all contain gluten. Brewer's yeast is a by-product of beer brewing and is not the same as nutritional yeast.


Modified food starch in the US is usually corn-based and safe. In Europe and Canada it may be wheat-based, so check the source.


What Gluten-Free Labels Mean


In the US, FDA requires that products labeled gluten-free contain fewer than 20 parts per million of gluten. This is the internationally recognized threshold safe for most people with celiac disease.


For stronger assurance look for third-party certifications. GFCO requires testing to less than 10 ppm. NSF International Gluten-Free provides independent testing.


Advisory Statements


Phrases like may contain wheat warn about cross-contamination risk. Whether to consume these products is a personal decision based on your sensitivity level.


Medications and Supplements


Prescription medications can contain gluten as a binding agent. Always ask your pharmacist to check. Label reading becomes faster with practice.

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